t = int (input("请输入体体重:"))
s = int (input("请输入身高:"))
# 身高按 cm 标准输入
BMI = t/(s/100)**2
if BMI<18.5:
    print(BMI,", 体重过青")
elif    18.5<=BMI<=24:
    print(BMI," ,正常")
else:
    print("胖子")
